Weather Alert in Oregon
Red Flag Warning issued August 3 at 7:42AM MDT until August 3 at 9:00PM MDT by NWS Boise ID
AREAS AFFECTED: Burns BLM; Central Canyonlands; Northwestern Vale BLM; Baker Valley
DESCRIPTION: The National Weather Service in Boise has issued a Red Flag Warning for lightning, which is in effect from 3 PM MDT /2 PM PDT/ this afternoon to 9 PM MDT /8 PM PDT/ this evening. * AFFECTED AREA...In Oregon, Fire Weather Zones 670 Burns BLM, 673 Central Canyonlands, 674 Northwestern Vale BLM and 675 Baker Valley. * TIMING...From 3 PM MDT /2 PM PDT/ this afternoon to 9 PM MDT /8 PM PDT/ this evening. * THUNDERSTORMS...Scattered coverage with abundant lightning. * OUTFLOW WINDS...Gusty erratic winds up to 60 mph. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended.
INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will occur shortly.
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Weather Topic: What are Wall Clouds?
Home - Education - Cloud Types - Wall Clouds
Next Topic: Altocumulus Clouds
A wall cloud forms underneath the base of a cumulonimbus cloud,
and can be a hotbed for deadly tornadoes.
Wall clouds are formed by air flowing into the cumulonimbus clouds, which can
result in the wall cloud descending from the base of the cumulonimbus cloud, or
rising fractus clouds which join to the base of the storm cloud as the wall cloud
takes shape.
Wall clouds can be very large, and in the Northern Hemisphere they generally
form at the southern edge of cumulonimbus clouds.
Next Topic: Altocumulus Clouds
Weather Topic: What are Altostratus Clouds?
Home - Education - Cloud Types - Altostratus Clouds
Next Topic: Cirrocumulus Clouds
Altostratus clouds form at mid to high-level altitudes
(between 2 and 7 km) and are created by a warm, stable air mass which causes
water vapor
to condense as it rise through the atmosphere. Usually altostratus clouds are
featureless sheets characterized by a uniform color.
In some cases, wind punching through the cloud formation may give it a waved
appearance, called altostratus undulatus. Altostratus clouds
are commonly seen with other cloud formations accompanying them.
Next Topic: Cirrocumulus Clouds
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